Category: How To

How to: Install a DNA air filter for your KTM Duke 125/200


DNA air filter for KTM Duke 125/200

Recently, I yet again undertook another small DIY project.  This time, I tried to replace the stock paper filter on my KTM Duke 125 with a DNA air filter. (KTM Duke 200 owners, this works for your bike as well as the models are basically the same).

What are the advantages of a DNA air filter over the stock one?

Firstly, it increases the air flow to your engine and lets it breathe more easily.  DNA claims that this gives your engine more power.  Secondly, unlike the stock paper filter, it is also washable and re-usable.

For me, it wasn’t so much the performance benefit, but the fact that I wanted to learn how to install it and that it was re-usable.   If you’re interested in the performance aspect though, DNA gives a detailed explanation of their air filter benefits here.

DNA’s competitor, K&N, has a pretty good video showing the improved flow rate of their products (K&N, not DNA) compared to stock air filters.

Since, it’s a fairly simple operation, the installation went pretty smoothly (unlike the R&G tail tidy), but there were some details and additional steps that I took to improve the performance of the air filter and prevent dust from accidentally dropping into the air box (BIG NO NO).

Lets hope you’ll find this post useful.  Ready to install your DNA air filter? Read on.

Things you’ll need

  1. DNA air filter for KTM Duke 125/200
  2. Air filter oil (I use Maxima Fab 1 spray type)
  3. Clean rags
  4. Fastener remover

Prepare for installation

Remove the rear seat. Unscrew front seat fasteners and remove the front seat.

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Remove front seat fasteners then front seat

Take a look at your air filter cover. Is it dirty or dusty? If so, clean it before doing anything else. This prevents any dirt from accidentally dropping into the air box when you when you remove it. A damp cloth works fine.

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Clean your air filter box before proceeding

Unscrew the air filter cover fasteners and lift it up to expose the old air filter.  Take out the stock paper air filter.


Don’t let dirt fall into your air box when removing air filter!

Before you stick in your brand new DNA air filter, take at your air box.  If the edges of the air box are dirty, wipe away the dirt in an OUTWARD motion. I stuffed a clean rag in the air box before wiping the air box edges. It’s pays to be careful here.

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Clean the air box

Prepare DNA air filter

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Lay air filter on clean rag

Lay the new filter on a rag and apply air filter oil liberally on the inside and outside. The right amount to apply is when the whole filter is soaked with oil.  Leave it aside for 10 mins for the oil to dry then wipe away any excess oil.

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Apply oil generously on front and back

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Apply oil generously on front and back

Apply some grease around the edges of the air filter.  This lets it form a better seal with the air box when it’s installed.  Install the air filter, then screw back all fasteners.

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Put some grease on air filter edge where it meets the air filter box

You’re done! Now go for a ride and enjoy your better breathing engine!


  1. Your engine will run rich for a while as its full of oil.
  2. After 3000 km (less if you ride in dusty conditions), repeat to clean and maintain your air filter.

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